Method and Arrangement in a Telecommunication System

2. The method as claimed in claim 1, wherein the plurality of group subsets of downlink control channels are mapped to a number of control channel elements (CCEs).

3. The method as claimed in claim 2, further comprising determining the number of CCEs mapped to the plurality of group subsets of downlink control channels.

4. The method as claimed in claim 3, wherein the determination that the received downlink subframe includes a plurality of group subsets of downlink control channels is based, at least in part, on the determined number of CCEs mapped to the plurality of group subsets of downlink control channels.

5. The method as claimed in claim 2, further comprising determining that the determined number of CCEs mapped to the plurality of group subsets of downlink control channels is above a threshold value.

6. The method as claimed in claim 5, wherein the determination that the received downlink subframe includes a plurality of group subsets of downlink control channels is based, at least in part, on the determination that the determined number of CCEs mapped to the plurality of group subsets of downlink control channels is above the threshold value.

7. The method as claimed in claim 2, wherein the number of CCEs is associated with an aggregation level.

8. The method as claimed in claim 7, further comprising determining the aggregation level associated with the number of CCEs.

9. The method as claimed in claim 8, wherein the determination that the received downlink subframe includes a plurality of group subsets of downlink control channels is based, at least in part, on the determined aggregation level associated with the number of CCEs.

11. The user equipment as claimed in claim 10, wherein the plurality of group subsets of downlink control channels are mapped to a number of control channel elements (CCEs).

12. The user equipment as claimed in claim 11, wherein the at least one processor is further configured to, working with the radio frequency interface, cause the user equipment to perform determining the number of CCEs mapped to the plurality of group subsets of downlink control channels.

13. The user equipment as claimed in claim 12, wherein the determination that the received downlink subframe includes a plurality of group subsets of downlink control channels is based, at least in part, on the determined number of CCEs mapped to the plurality of group subsets of downlink control channels.

14. The user equipment as claimed in claim 11, wherein the at least one processor is further configured to, working with the radio frequency interface, cause the user equipment to perform determining that the determined number of CCEs mapped to the plurality of group subsets of downlink control channels is above a threshold value.

15. The user equipment as claimed in claim 5, wherein the determination that the received downlink subframe includes a plurality of group subsets of downlink control channels is based, at least in part, on the determination that the determined number of CCEs mapped to the plurality of group subsets of downlink control channels is above the threshold value.

16. The user equipment as claimed in claim 11, wherein the number of CCEs is associated with an aggregation level.

17. The user equipment as claimed in claim 16, wherein the at least one processor is further configured to, working with the radio frequency interface, cause the user equipment to perform determining the aggregation level associated with the number of CCEs.

18. The method as claimed in claim 17, wherein the determination that the received downlink subframe includes a plurality of group subsets of downlink control channels is based, at least in part, on the determined aggregation level associated with the number of CCEs.

20. The method as claimed in claim 1, wherein a number of user equipments in the limited group that decodes the group subset is one.

22. The user equipment as claimed in claim 10, wherein a number of user equipments in the limited group that decodes the group subset is one.

23. The method as claimed in claim 1, wherein the identifier of the user equipment is a Radio Network Temporary Identifier (RNTI).

24. The user equipment as claimed in claim 10, wherein the identifier of the user equipment is a Radio Network Temporary Identifier (RNTI).

25. The method as claimed in claim 19, further comprising using the common subset for carrying a broadcast message.

26. The user equipment as claimed in claim 21, wherein the at least one processor is further configured to obtain a broadcast message from the common subset.